Hi Jim, I followed your suggestion and was able to bisect the kernel patches. The offending patch is: drm/amdgpu: defer test IBs on the rings at boot (V3) commit: 2c773de2ecb8c327f2448bd1eecad224e9227087 <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v4.18-rc4&id=2c773de2ecb8c327f2448bd1eecad224e9227087> After reverting this patch the IB test succeeded with kernel v4.18-rc4 on both systems and the amdgpu driver was correctly loaded both on SAPPHIRE RX550 4GB and on SAPPHIRE RX460 2GB. The GPU hang remains, however. I will try to configure a remote IPMI connection to see what is happening with the kernel boot or setup a serial console for the Kernel. Thanks & Regards, LuÃs On Wed, Jul 11, 2018 at 10:56 AM, jimqu <jimqu at amd.com> wrote: > HI Luis, > > > Let us trace the issue one by one. > > > IB test fail: > > This should be regression issue on 4.18, you can bisect the kernel patches. > > GPU hang: > > Fix IB test fail first. > > > Thanks > > JimQu > > > > On 2018å¹´07æ??11æ?¥ 17:34, LuÃs Mendes wrote: > > Hi Jim, > > Thanks for your interest in this issue. Actually this is a multiple > issue... not only the IB ring test is failing... as I am having quite some > trouble getting the cards SAPPHIRE RX 550 4GB on a Tyan S7025 and SAPPHIRE > RX 460 2GB on a TYAN S7002 to work, both systems using same Ubuntu 18.04 > with vanilla kernel. > > *1. May you also test earlier kernel? v4.17 or v4.16.* > I've tested kernels v4.17.5 and v4.16.6 with same system and both are able > to pass the IB ring test and system boots into X using NVIDIA as the > display connected card. > dmesg log attached for kernel 4.17.5, file TYAN_S7025_kernelv4.17.5_ > amdgpu_IB_ring_test_OK.txt. > > *2. May you test the issue only with amdgpu?* > - I've tested on a TYAN S7002 system with a single SAPPHIRE RX 460 2GB, > on-board VGA enabled and used as primary display. > Kernel v4.18-rc4 fails the IB ring test, system is able to enter X through > the on-board VGA. > dmesg log attached for kernel 4.18-rc4, file TYAN_S7002_kernel_v4.18-rc4_ > IB_ring_test_fail.txt. > > - Same TYAN S7002 system, but now with on-board VGA disabled and using RX > 460 as display connected card. > Kernels v4.17.5 and v4.16.6 are able to pass the IB ring test, but GPU > hangs before entering X. Don't have logs for these yet. > > Regards, > LuÃs Mendes > Aparapi contributor and MSc Researcher > > > > > > On Wed, Jul 11, 2018 at 3:49 AM, Qu, Jim <Jim.Qu at amd.com> wrote: > >> Hi Luis, >> >> 1. May you also test earlier kernel? v4.17 or v4.16. >> 2. May you test the issue only with amdgpu? >> >> Thanks >> JimQu >> >> ________________________________________ >> å??件人: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> 代表 LuÃs Mendes < >> luis.p.mendes at gmail.com> >> å??é??æ?¶é?´: 2018å¹´7æ??11æ?¥ 6:04:00 >> æ?¶ä»¶äºº: Michel Dänzer; Koenig, Christian; amd-gfx list >> 主é¢?: Re: Regression with kernel 4.18 - AMD RX 550 fails IB ring test on >> power-up >> >> Hi, >> >> Issue remains in kernel 4.18-rc4 using SAPPHIRE RX 550 4GB. >> >> Logs follow attached. >> >> Regards, >> Luis >> >> On Tue, Jun 26, 2018 at 10:08 AM, LuÃs Mendes <luis.p.mendes at gmail.com >> <mailto:luis.p.mendes at gmail.com>> wrote: >> Hi, >> >> I've tried kernel 4.18-rc2 on a system with a NVIDIA GTX 1050 Ti and an >> AMD RX 550 4GB and the RX 550 card is failing the IB ring test. >> >> [ 5.033217] [drm:gfx_v8_0_ring_test_ib [amdgpu]] *ERROR* amdgpu: ib >> test failed (scratch(0xC040)=0xFFFFFFFF) >> [ 5.033264] [drm:amdgpu_ib_ring_tests [amdgpu]] *ERROR* amdgpu: failed >> testing IB on ring 6 (-22). >> >> Please see the attached log. >> >> Regards, >> LuÃs >> >> > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.freedesktop.org/archives/amd-gfx/attachments/20180711/da03035c/attachment.html>
